Absolute Boy (絶対少年, Zettai Shōnen?) is a 26-episode Japanese anime series produced by Ajia-do Animation Works and Bandai Visual, which premiered from May 21, 2005 to November 19, 2005, and was broadcast by the anime television network, Animax, across its respective networks worldwide, including Japan, East Asia, Southeast Asia, and other regions.

Aizawa Ayumu is a young boy, who is sent to a small town called Tana to live with his father for a while. Even though he doesn't want to go, he agrees to do so when his mother offers him a mountain bike. Ayumu used to live in Tana before, and now his memories of the time are shrouded in mystery - apparently something happened when he was a child. Enter Miku, a young girl who knows more than she tells, weird glowing lights floating around, reflections of UFOish objects in the eyes of cats and dogs, a nosy female announcer, a forest with a mysterious past, and a weird boy called Wakkun, who wears the clothes Ayumu used to when he was a child, and you get the world of Zettai Shonen, where mysteries remain mysteries amidst a slow, normal, everyday life.